Scanning photovoltage microscopy of potential modulations in carbon nanotubes

Journal Article (Journal Article)

We use the locally generated photovoltage in carbon nanotubes to image potential modulations produced by defects. The correlation with spatially resolved spectroscopy of the disorder-enhanced Raman band allows us to locate the defects and to determine their effect on band bending. The defects produce local potential maxima, which are consistent with trapped electrons near the tube. An offset photovoltage is generated when the laser populates metastable traps in the oxide. Previously uncharged defects can thus be imaged. To demonstrate the versatility of the technique, we show that tube-tube junction at the base of nanotube loops can be electronically characterized. © 2007 American Institute of Physics.

Full Text

Duke Authors

Cited Authors

  • Freitag, M; Tsang, JC; Bol, A; Avouris, P; Yuan, D; Liu, J

Published Date

  • August 1, 2007

Published In

Volume / Issue

  • 91 / 3

International Standard Serial Number (ISSN)

  • 0003-6951

Digital Object Identifier (DOI)

  • 10.1063/1.2757100

Citation Source

  • Scopus